diff --git a/usertable.cpp b/usertable.cpp
index 11fd04b..f8b157a 100644
--- a/usertable.cpp
+++ b/usertable.cpp
@@ -471,7 +471,7 @@ void UserTable::OnEvent(InotifyEvent& rEvt)
 
     // for system table
     if (m_fSysTable) {
-      if (system(cmd.c_str()) != 0) // exec failed
+      if (execl("/bin/sh","sh", "-c", cmd.c_str(), (char *)0) != 0) // exec failed
       {
         syslog(LOG_ERR, "cannot exec process: %s", strerror(errno));
         _exit(1);